Blog Revamp

Hello all,

I'm redesigning the Blog, have no idea how to do so and - therefore - please bear with me as I play around and get it the way I want it.

Either I truly have no idea what I'm doing or Blogger has no option to play around without it saving it publicly. You'd think they'd allow you to redesign your Blog without changing anything live until you tell it to.
Oh well...bear with me!!